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<http://schema.org/description>
"Optical microscopy has a diffraction-limited resolution determined by the wavelength of the laser and the numerical apertures of the objective and condenser. Even for the best optical microscope, this resolution is limited to several hundreds of nanometers."
<https://www.optica-opn.org/home/articles/volume_3/issue_12/features/laser_diode_delivers_atomically-resolved_images/>